Cushion Cut Ruby & CZ Ring in solid sterling silver. Material: Sterling Silver. Total metal weight: 3.25 gr. Cushion cut ruby (8 x 8 mm) = 3 ct total. Round cut cubic zirconia (1 x 1 mm) = 0.62 ct total. Colour: Red. Stone cut: Cushion Cut. Occasion: Engagement, Wedding, Mother's Day. Anniversary: 15th Anniversary, 40th Anniversary. Birthstone: July.